Originally posted by AndersHermansson If indeed there are other universes out there, one for each and every possibility. Will there not be one that continues, where you took off?

There are two possibilities: you live or die.
Say in this universe you live (yay!) but in the other possibility, you die. I am speaking in the context of quantum universes, so they branch out like a tree, so to speak. Anyway, so you are both alive and dead. This is called superpositioning. Since there are 2 possibilities, you experience only 1/2 of the whole reality. Thhere is one wave function that specifies the whole reality. For you in possibility 1 (the one in which you live), the wave function collapses and you have a definite answer that you are alive. In the other, the same thing happens (you get a definite answer or the wave function collapses) except you die. There is an illusion of two wave functions, but there is only one that describes the whole reality.

Even if they were indentical in that respect, they would still have a different location. That seems to be the only way to speak of indentity, since the individual particles of the universe are not made up of substances.